diff options
Diffstat (limited to 'config.c')
| -rw-r--r-- | config.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/config.c b/config.c new file mode 100644 index 0000000..bc1ec4f --- /dev/null +++ b/config.c @@ -0,0 +1,178 @@ +#include <stdio.h> +#include <ctype.h> +#include <string.h> +#include <stdlib.h> +#include <stdbool.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <fcntl.h> +#include <glob.h> +#include <unistd.h> + +#define _IS_CONFIG_C +#include "config.h" +#undef _IS_CONFIG_C + +const char *wlan_interface; +const char *eth_interface; +const char *wmii_path; +const char *time_format; +const char *battery_path; +bool use_colors; +const char *wmii_normcolors; +char order[MAX_ORDER][2]; +const char **run_watches; +unsigned int num_run_watches; + +void die(const char *fmt, ...); + +/* + * This function exists primarily for resolving ~ in pathnames. However, you + * can also specify ~/Movies/ *, which will only return the first match! + * + */ +char *glob_path(const char *path) { + static glob_t globbuf; + if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0) + die("glob() failed"); + char *result = strdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path); + globfree(&globbuf); + return result; +} + +/* + * Loads configuration from configfile + * + */ +static void get_next_config_entry(FILE *handle, char **dest_name, char **dest_value, char *whole_buffer, int whole_buffer_size) { + char *ret; + if ((ret = fgets(whole_buffer, whole_buffer_size, handle)) == whole_buffer) { + char *c = whole_buffer; + /* Skip whitespaces in the beginning */ + while (isspace((int)*c) && *c != '\0') + c++; + *dest_name = c; + while (!isspace((int)*c)) + c++; + /* Terminate string as soon as whitespaces begin or it's terminated anyway */ + *(c++) = '\0'; + + /* Same for the value: strip whitespaces */ + while (isspace((int)*c) && *c != '\0') + c++; + *dest_value = c; + /* Whitespace is allowed, newline/carriage return is not */ + while ((*c != '\n') && (*c != '\r') && (*c != '\0')) + c++; + *c = 0; + } else if (ret != NULL) + die("Could not read line in configuration file"); +} + +/* + * Reads the configuration from the given file + * + */ +int load_configuration(const char *configfile) { + #define OPT(x) else if (strcasecmp(dest_name, x) == 0) + + /* Check if the file exists */ + struct stat buf; + if (stat(configfile, &buf) < 0) + return -1; + + int result = 0; + FILE *handle = fopen(configfile, "r"); + if (handle == NULL) + die("Could not open configfile"); + char *dest_name = NULL, *dest_value = NULL, whole_buffer[1026]; + struct stat stbuf; + while (!feof(handle)) { + get_next_config_entry(handle, &dest_name, &dest_value, whole_buffer, 1024); + /* No more entries? We're done! */ + if (dest_name == NULL) + break; + /* Skip comments and empty lines */ + if (dest_name[0] == '#' || strlen(dest_name) < 3) + continue; + + OPT("wlan") + { + wlan_interface = strdup(dest_value); + } + OPT("eth") + { + eth_interface = strdup(dest_value); + } + OPT("wmii_path") + { + char *globbed = glob_path(dest_value); + if ((stat(globbed, &stbuf)) == -1) + die("wmii_path contains an invalid path"); + if (globbed[strlen(globbed)-1] != '/') + die("wmii_path is not terminated by /"); + wmii_path = globbed; + } + OPT("time_format") + { + time_format = strdup(dest_value); + } + OPT("battery_path") + { + if ((stat(dest_value, &stbuf)) == -1) + die("battery_path contains an invalid path"); + battery_path = strdup(dest_value); + } + OPT("run_watch") + { + char *name = strdup(dest_value); + char *path = name; + while (*path != ' ') + path++; + *(path++) = '\0'; + num_run_watches += 2; + run_watches = realloc(run_watches, sizeof(char*) * num_run_watches); + run_watches[num_run_watches-2] = name; + run_watches[num_run_watches-1] = path; + } + OPT("order") + { + #define SET_ORDER(opt, idx) { if (strcasecmp(token, opt) == 0) sprintf(order[idx], "%d", c++); } + char *walk, *token; + int c = 0; + walk = token = dest_value; + while (*walk != '\0') { + while ((*walk != ',') && (*walk != '\0')) + walk++; + *(walk++) = '\0'; + SET_ORDER("run", ORDER_RUN); + SET_ORDER("wlan", ORDER_WLAN); + SET_ORDER("eth", ORDER_ETH); + SET_ORDER("battery", ORDER_BATTERY); + SET_ORDER("load", ORDER_LOAD); + SET_ORDER("time", ORDER_TIME); + token = walk; + } + } + OPT("color") + { + use_colors = true; + } + OPT("normcolors") + { + wmii_normcolors = strdup(dest_value); + } + else + { + result = -2; + die("Unknown configfile option: %s\n", dest_name); + } + dest_name = dest_value = NULL; + } + fclose(handle); + + if (wmii_path == NULL) + die("No wmii_path specified in configuration file"); + + return result; +} |